package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

@Slf4j
@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 后期需要进行md5加密，然后再进行比对
        // 需要将前端传递过来的明文密码先进行md5加密，再进行对比
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param dto
     */
    @Override
    public void add(EmployeeDTO dto) {
        log.info("EmployeeService，线程id={}", Thread.currentThread().getId());
        Employee employee = new Employee();
        //拷贝属性值
        BeanUtils.copyProperties(dto, employee);

        // 1.补充基础属性
        // employee.setCreateTime(LocalDateTime.now());
        // employee.setUpdateTime(LocalDateTime.now());
        // //使用ThreadLocal获取登录人id
        // employee.setCreateUser(BaseContext.getCurrentId());
        // employee.setUpdateUser(BaseContext.getCurrentId());
        employee.setStatus(StatusConstant.ENABLE);

        // 2.补充密码，将密码进行md5加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        // 3.调用mapper的方法，新增员工
        employeeMapper.insert(employee);
    }

    /**
     * 员工分页查询
     * @param dto
     * @return
     */
    @Override
    public PageResult page(EmployeePageQueryDTO dto) {
        //0.导入分页插件依赖
        //1.设置分页参数
        PageHelper.startPage(dto.getPage(), dto.getPageSize());

        //2.调用mapper的查询方法(普通条件查询), 获取page结果对象
        Page<Employee> page = employeeMapper.page(dto);

        //3.封装PageResult对象，并返回
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 启用禁用员工
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //1.准备员工对象，数据封装
        //2.补充基础属性
        Employee employee = Employee.builder()
                                .id(id)
                                .status(status)
                                .build();
        //3.调用mapper的更新方法
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        return employeeMapper.getById(id);
    }

    @Override
    public void update(EmployeeDTO dto) {
        //属性拷贝
        Employee employee = new Employee();
        BeanUtils.copyProperties(dto, employee);
        //1.补充更新时间+修改人
        // employee.setUpdateTime(LocalDateTime.now());
        // employee.setUpdateUser(BaseContext.getCurrentId());
        //2.调用mapper
        employeeMapper.update(employee);
    }

    /**
     * 修改密码
     * @param passwordEditDTO
     */
    @Override
    public void editPassword(PasswordEditDTO passwordEditDTO) {
        //1.获取新密码和旧密码
        String oldPassword = passwordEditDTO.getOldPassword();
        String newPassword = passwordEditDTO.getNewPassword();

        //2.获取当前登录员工id,并根据员工id查询数据库获取密码
        Long empId = BaseContext.getCurrentId();
        Employee emp = employeeMapper.getById(empId);
        //3.判断输入的旧密码是否正确
        if (!emp.getPassword().equals(DigestUtils.md5DigestAsHex(oldPassword.getBytes()))) {
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        //4.将新密码进行MD5加密
        newPassword = DigestUtils.md5DigestAsHex(newPassword.getBytes());

        //5.构造employee对象
        Employee employee = Employee.builder()
                .id(empId)
                .password(newPassword)
                .build();

        //6.调用mapper更新方法，修改员工密码
        employeeMapper.update(employee);
    }

}
